Further, having affirmed that he would be beholden to none of them, he got the contract to carry the United States mail, twice a week, from Kelterville up over Tarwater Mountain to Old Almaden--which was a sporadically worked quick-silver mine in the upland cattle country.
spindle. 1. a pin tapered at one end or both ends, or something with this shape. 2. the thin, tapering figure occurring during metaphase of cell division, composed of microtubules radiating from the centrioles and connecting to the chromosomes at their centromeres.
Spindle Fibers. spindle fibers A collection of microtubules attached to a centromere during mitosis and meiosis that are responsible for the movement of the chromosomes to opposite poles. Spindle fibers align the chromosomes along the middle of the cell nucleus. This line is referred to as the metaphase plate.ome attach to one kinetochore of a dyad with those growing from the opposite centrosome binding to the other kinetochore of that dyad. Some bind to the arms of the chromosomes. Spindle fibers are made of microtubules. Microtubules are lengthened and shortened by the addition and loss of tubulin subunits.